Pangerl, Jonas and Mueller, Max and Rueck, Thomas and Weigl, Stefan and Bierl, Rudolf (2022) Characterizing a sensitive compact mid-infrared photoacoustic sensor for methane, ethane and acetylene detection considering changing ambient parameters and bulk composition (N-2, O-2 and H2O). SENSORS AND ACTUATORS B-CHEMICAL, 352: 130962. ISSN 0925-4005
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We present a sensitive and compact interband cascade laser (ICL) based photoacoustic setup for the detection of gaseous hydrocarbons and discuss its applicability towards trace gas analysis. We investigated the performance of the sensor for trace concentrations of methane, ethane and acetylene diluted in nitrogen. The excitation of methane and ethane was accomplished using one tunable diode laser, covering a range from 3360 to 3372 nm, which was replaced by a separate ICL at 3025 nm for acetylene detection. The influence of ambient parameters such as temperature, flow rate and pressure as well as potential cross-sensitivities towards O2 and H2O have been examined in terms of methane and acetylene detection. A series of simulations proved several of these influences to be attributed to relaxation effects. With a 3 sigma limit of detection (LoD) of 6.8 parts per billion (ppbV) in case of methane, 2.3 ppbV regarding ethane and 3.6 ppbV in terms of acetylene, the sensor demonstrates a great potential for applications in the field of trace gas analysis.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | VIBRATIONAL-ENERGY TRANSFER; SPECTROSCOPY; RELAXATION; BIOMARKERS; MIXTURES; BREATH; SIGNAL; OXYGEN; QEPAS; CH4; Methane; Ethane; Acetylene; Photoacoustic spectroscopy; Interband cascade laser; Cross-sensitivities; Relaxation effects |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 28 Jul 2022 07:46 |
| Last Modified: | 28 Jul 2022 07:50 |
| URI: | https://pred.uni-regensburg.de/id/eprint/46012 |
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